Casing-elevator



E. DOUBLE AND B. N. YOUNGKEN.

CASING ELEVATOR.

APPLICATION FlLxiDj1AN.30,192o.

A TTORNE Y E. DOUBLE AND B. N. YOUNGKEN.

CASING ELEVATOR.

APPLICATION FILED IAN. 3o, |920.

1 ,358,943, Patend Nov. 16, 1920.

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A I l I l 19 I 8 9 6 IIII` 1f I INVENTOR. f E'wa'pdoub/ef Jn I 0 fr, n?) je IY wauw/fm ATTORNEY UNITED STATES PATENT OFFICE.

EDWARD DOUBLE AND BEN N. YOUNGKEN, OF LOS ANGELES, CALIFORNIA.

CASING-ELEVATOR.

Specification of Letters Patent.

Patented N 0V. 16, 1920.

Application filed January 30, 1920. Serial No. 355,120.

To all whom t may concern.'

Be it known that we, EDWARD DOUBLE and BEN N. YoUNGnEN, both citizens of the United States, residing at Los Angeles, in the county of Los Angeles and vState of California, have invented a new and useful Casing-Elevator, of which the following is a specification.

Our invention relates to a casing elevator of the type generally used for raising, low ering or supporting well casings, sucker rods and pump tubing.

An object of the invention is to provide a simple, compact and durable elevator which can be easily and quickly manipulated and which. will fulfil all the requirements of heavy dirty service demanded of devices of this character.

Another object is to provide a two-part hingedly united elevator having a latch for the gate which is positively retained in latching position by a shoulder or coupling of the casing or rod engaged by the elevator.

A further object is to provide an elevator having a smooth, unbroken table surface by so constructing and positioning the latch in a recess in the upper surface of the elevator body that, when in normal position, the exposed upper surface of the latch will be flush with said body surface.

Another object is to provide a pivoted latch which is supported on the body of the elevator beneath the latch pivot to relieve said pivot of shearing strains.

Another object is to provide a latch having a three point supporting contact on the elevator body and gate, distributing the weight supported by said latch and maintaining the latch in true horizontal plane.

Vith these and incidental objects in view, the invention consists of certain novel features of construction and combination of parte, the essential elements of which are recited in the appended claims and a preferred form of embodiment of which is described in detail hereinafter and fully illustrated in the accompanying drawings form in a part of this specification.

iin the drawings corresi'ionding reference characters designate corresponding parte` throughout the several views of which:

Figure 1 is a top plan view of an elevator embodying the features of the present invention.

Fig. 2 is a side elevation.

Fig. 3 is a transverse section on line angw3 of Fig. 1.

Fig. 4 is a transverse section on line aA-y/* of Fig. l.

Fig. 5 is a perspective view showing the gate 1n open position.

Fig. 6 1s a perspective view of the latch end of the elevator body with the latch removed.

F ig. 7 is a detail perspective view of the vlatch looking at its under side.

The body portion of the elevator com prises a substantially U-shaped casting 1, the medial concave inner surface 2 of which forms an approximate half circle and is adapted to engage the casing or rod to which the elevator is applied. Diametrically opposed ears 3 3 extend outwardly from the medial portion of the body and are provided with transverse orifices 4-4 to receive the bails 5 5 which may be of any of the many well known types. l To facilitate a lateral removal of the bails I provide removable blocks 6-6 forming the outer walls of the orifices 1-4, each held in place by bolts 7 7 extended vertically through the ears 3 8 and the blocks. Adjacent one end of the concave surface of the body I provide bearings 8-8 projected laterally and relatively spaced to form a suitable opening to receive a hinge bearing 9 of a gate 10 which is journaled on a pivot pin 14. The inner concave surface 11 of the gate is curved to conform to the surface 2 of the body and when the gate is closed, registers therewith to form a vertical concentric bore adapted to closely embrace the object to which the elevator is applied. The free end of the gate has a lateral tongue 12 adapted to engage a shelf 13 on the body l when the gate is in closed position.

The gate 10 is latched in closed position by a latch 15 which is positioned or embedded within a recess 16 formed in the upper surface of the body and is pivoted to swing vertically on a pivot pin 17. The hook nose 18 of the latch is supported upon and hooks over the tongue 12 of the gate to latch the gate in closed position and is provided with a beveled surface 19 which is adapted to be engaged by said tongue to cam the latch upwardly, to the position shown in dotted lines in Fig. 3, during a, closing of the gate, after which a spring 20, exerting its tension in rear of the latch pivot, automatically forces'said latch to normal postion to latch the gate.

Referring to Fig, 8 it Will be seen that the latch has a bearing contact with the body beneath the pivot pin 1T, whereby any downward force applied to this portion of the latch is transmitted directly to the body to relieve the pivot pin of shearing strains, To positively maintain the latch in latching position when the elevator is in use, We provide the latch 15 with a lug 21 which extends laterally in the recess 16 to a point approximately flush vvith the concave surface 2 of the body. When the elevator engages a casing the shoulder or coupling thereof, which is supported upon the upper table surface of the elevator, engages the latch lug 21 to maintain said latch in latching engagement with the gate.

Attention is directed to the three point supporting contact of the latch upon the body and gate, the free end of the latch being supported upon the upper surface of the gate tongue, the lug 21 supported upon the body at the base of the recess 16 and the journal portion supported upon the body beneath the pivot pin 17. These points of support are Widely separated both laterally and transversely, thereby effectively maintaining the latch in true horizontal plane when the latch is in normal position.

In devices of this character it is desirable that the upper table surface thereof be relatively smooth and unbroken, and with this requirement in mind, it Will be noted that the latch 15 and the recess 16 are coincidently contoured and that the gate 10 closely fits the body and the'latch when in closed position. It will also be noted that the upper surfaces of the body, the gate and the latch areV all horizontally flush. This structure provides an elevator having a relatively smooth unbroken table surface.

To facilitate an easy and convenient manipulation of the gate a bail handle 22 is provided.

With reference to Fig. 1 it will be noted that the upper portion of the concave surface 2 of the body and the latch lug 21 form substantially more than a half circle extending on both sides of the diametric center of the bore and the opposed ears 3-3 of the body. This arrangement causes the maior portion of the Weight of the casing engaged, to be supported by the body of the elevator, thereby relieving the gate of excessive strains. It Will also be observed `that the gate tongue 12 is radially alined relative to the gate pivot and that the upper Weight bearing surface of the gate extends on both sides of an imaginary line intersecting the two points of gate support. namely, the pivot pin 14 and the tongue 12. This relieves the lgate pivot and the latch of excessive torsional strains.

The various uses for which an elevator of this type is adapted are now Well known in the art and therefore it will suffice for the purpose of this disclosure, to briefly describe the operation of the present invention as follows:

With the gate 10 opened, the elevator is engaged with the casing or other object to be moved or supported. with the concave surface 2 of the body 1 engaging the outer periphery thereof. The gate is then closed and latched in closed position by the latch 15 after Which the elevator is raised or lovered, through the bails 55, by the usual means employed for this purpose, a shoulder or coupling of the casing engaging the table surface of the elevator' adjacent the bore thereof. The casing coupling, when engaged by the elevator, Will engage the latch lug 21 to maintain said latch in latching engagement With the gate.

While the form of device herein shown and described is a preferred form, it is not intended that the invention be limited to the precise details thereof, for it is susceptible of embodiment in various forms, all coming Within the scope of the claims which follow.

Ne claim:

1. An elevator of the character described -comprising a body and a gate hingedly united, each having concave inner surfaces registering to define a vertical bore, the body having a recess formed in its upper surface and a horizontal shelf positioned to support the free end of the gate, and a latch pivoted within said recess having a hook end engaging the free end of the gate and a lateral lug engaging the body at the base of said recess and extended approximately to the concave inner surface thereof.

2. A Well elevator having a body and gate shaped to define a vertical bore, a vertically movable latch pivoted on the upper face of the body and adapted to engage the swinging end of the gate, a spring mounted on the body to maintain the latch in normal position, and a lateral lug adapted to maintain the latch in normal position under the load borne by the elevator.

3. A latch for Well elevators having an elongated body, a fulcrum, a hook end. and a lug extending laterally from the body intermediate the fulcrum and hook end.

1. An elevator' of the character described comprising a body and a gate hingedly united, each having concave inner surfaces registering to define a vertical bore, and a vertically movable latch pivoted on the body and engaging said body beneath the latch pivot, the forward end of the latch being supported upon and engaged over the free end of the gate and the medial portion of the latch being provided with a lateral lug resting upon the body and extended approximately t0 the concave surface thereof providing a three point support for the latch.

5. An elevator of the character described comprising a body and a gate hingedly united, each having concave inner surfaces registering to define a vertical bore, the body having a flat horizontal table surface provided with a recess, and a pivoted latch adapted to engage the free end of the gate, said latch being movably embedefl within said recess With its upper surface substantially flush With the table surface of the body.

6. A Well elevator comprising a body having lateral extensions, suspension means connected with said extensions, a gate hinged at one end to said body, a latch receiving recess formed Within the upper face of one of said extensions, a latch adapted to engage the swinging end of said gate, said latch being pivoted Within said recess and movable vertically relative to said body to release said gate, and a lug formed on said latch and projecting toward the bore of the elevator to maintain said latch in latched position under the Weight of the load borne by the elevator.

Signed at Los Angeles, California, this 21st day of January, 1920.

EDWARD DOUBLE. BEN N. YOUNGKEN.

Witnesses:

CLARENCE B. FOSTER, L. BELLE WEAVER. 

